A preliminary study of in vitro antibiotic activity of saperconazole and other azoles on Paracoccidioides brasiliensis.

Saperconazole, a new triazole related to itraconazole, was tested against Paracoccidioides brasiliensis and results compared with ketoconazole and itraconazole. The fungus was highly sensitive to the action of these compounds, particularly saperconazole, with minimum inhibitory concentrations and minimum fungicidal concentrations ranging from 10(-7) to 10(-10) M (equivalent to 6.7 x 10(-2)-6.7 x 10(-5) micrograms ml-1 for saperconazole), according to the morphological phase and the antifungal tested. The yeast phase was more sensitive than the mycelial phase to any of the azoles. Morphological changes were observed in the cell membranes, particularly when saperconazole was used as the antifungal agent.